package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import DB.GroupTableDB;

import com.google.gson.JsonObject;

public class GetGroups extends HttpServlet {

	ArrayList<JsonObject> Messages;
	/**
	 * Constructor of the object.
	 */
	public GetGroups() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String userID = (String)request.getAttribute("email");
		if(userID == null || userID.equals("")){
			JsonObject object = new JsonObject();
			object.addProperty("message", "UserID cannot be empty!");
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			out.print(object);
			out.flush();
			out.close();
		}else{
			GroupTableDB groupTableDB = new GroupTableDB();
			Messages = groupTableDB.seletGroupsByUser(userID);
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			out.print(Messages);
			out.flush();
			out.close();
		}
		
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
